Adding snapshot detail, to show the additional metadata captured with an image.

Also added a couple more test fodder pages, though console output isn't working as expected.  Added both to the seed.
Moving to use redirect URLS for all image access. Using filters for determining the URL
Updates to make 404s easier to read/understand.
Wiring up the last portions of PageDetail to use the Service and streamline Editing.
Adding bulk importer for pages... you paste csv, it parses, creates and snapshots.
Fixing a 404 that hadn't been hit before.